What is GHSA-vcgv-7rvm-m3vp?

GHSA-vcgv-7rvm-m3vp is a security advisory published by GitHub Security Advisories with Medium severity. Vikunja versions before 2.6.0 fail to properly validate link-share tokens in the v2 API user...

Which CVE IDs does GHSA-vcgv-7rvm-m3vp cover?

GHSA-vcgv-7rvm-m3vp covers the following CVE IDs: CVE-2026-91981. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-vcgv-7rvm-m3vp?

GHSA-vcgv-7rvm-m3vp has a CVSS v3 base score of 4.3, published by GitHub Security Advisories.

GHSA-vcgv-7rvm-m3vpMediumCVSS 4.3

Vikunja versions before 2.6.0 fail to properly validate link-share tokens in the v2 API user...

Vendor

GitHub Security Advisories

Published

September 15, 2026

Last Modified

September 15, 2026

🔗 CVE IDs covered (1)

CVE-2026-91981 →

📋 Description

Vikunja versions before 2.6.0 fail to properly validate link-share tokens in the v2 API user search endpoints. Attackers with a read-only share link can enumerate project users via the projects endpoint and confirm arbitrary usernames exist via the global search endpoint.

🔗 References (4)

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-vfxw-3x8p-2vjr
https://nvd.nist.gov/vuln/detail/CVE-2026-91981
https://www.vulncheck.com/advisories/vikunja-before-2.6.0-user-enumeration-via-v2-api
https://github.com/advisories/GHSA-vcgv-7rvm-m3vp